Recess - LR
Axially extended recesses are formed on the inner circumference of the head, and the tightening driving angle is designed to be zero.
- Maximum torque transmission is achieved from 0 degree driving angle design
- Allows no cam-out of tightening tools
- Preventing damage of recess of screws when tightening
- Available high durability of tightening tools
Outstanding efficiency for tamper resistance by special tools
Most suitable for preventing cam-out trouble